Spring harrow-tooth



(No Model.)

F. VAN PATTEN. SPRING'HARROW TOOTH.

No. 412,864. Patented 001:. 15, 1889.

,upper section B serving as a holder and se- UNITED STATES i FREDERICK VAN PATTEN,

PATENT OFFICE.

or AUBURN, NEW YoEK.

SPRING HARROW-TOOTH.

SPECIFICATION forming part of Letters Patent No. 412,864, dated October 15, 1889.

Application filed April 19, 1889. fierial No. 307,774. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK VAN PAT- TEN, a citizen of the United States, residing at Auburn, in the county of Cayuga and State of New York, have invented a new. and useful Spring Harrow-Tooth, of which the following is a specification.

My invention relates to improvements in spring harrow-teeth; and it consists in certain novel features hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a perspective view of a barrow-tooth embodying my invention. Fig. 2 is a detail perspective View of the fastening device. Fig. 3 is a longitudinal section of the same. 4 is a detail perspective View of a modification.

My improved tooth comprises two sections or members A B, the lower section A being provided with the cultivating-point, and the cured to the beam. The said upper section B is provided with a central longitudinal corrugation G and is secured to the beam 1) by a clamping-plate E, which is fitted over the end of the holder and is provided with a corrugation or groove F, which is adapted to engage the bead or rib formed by the corrugation in the holder. The securing-bolts G are passed through the beam and the ends of the clamping-plate, so as to bind the said clamping-plate around the holder and thereby firmly secure the holder to the beam. The longitudinal corrugation and the groove of the clamping-plate effectually preventrotation of the holder as will be readily understood.

The lower section or tooth properA is provided in its upper portion with a longitudinal groove I, which forms a bead adapted to engage the corrugation of the holder when the two sections are fitted together, and around the meeting ends of the two sections I arrange a clip J, which is provided with a central groove K, adapted to engage the corrugation of the holder, and has its ends extending past the edges of the holder and the tooth to form bearings for the clamping-plate L. This clamping-plate L has one edge arranged so as to bear against the tooth, and is provided at its ends near its opposite edge with the trunnions M, adapted to engage suitable openings in the ends of the clip. The clamping-plate is further provided with a sleeve or bearing N, in which a set-screw O is mounted, the said set-screw being adapted to bind against the tooth, and the bearing and the clamping-edge of the clamping-plate being on opposite sides of the journals of the said plate.

From the foregoing description it will be seen that I have provided an extremely si1nple and efficient device, by means of which the tooth .will be firmly secured to the holder and can be readily adjusted thereon so as to enter the soil to the desired depth. By turning up the set-screw so that it will bear against the tooth the bearing of the clamping-plate will be forced outward on the set-screw, and the free edge of the clamping-plate thereby caused to travel toward the tooth and bind against the same. Itwill thus be seen that the tooth is firmly clamped against the holder at two distinct points,'so that it will be se curely held.

hen it is desired to adjust the tooth to enter the soil to a greater or less depth, the set-screw is loosened, the tooth then shifted between the clamping-plate and the holder to the desired point, and the set-screw then turned up, as will be readily understood. The tooth will be prevented from swinging laterally by reason of the corrugated construction of the clip, the holder, and the tooth, and also by reason of the ends of the clip lying against the edges of the holder and the tooth.

In Fig. 4 I have shown a slightly-modified form of my device in which the corrugations of the tooth, the holder, and the clip are dispensed with, and the several parts constructed with smooth, fiat surfaces. The operation of this form of the device is the same as that shown in the other figures, as will be readily understood.

The device might be further modified by substituting a cam for the set-screw or by employing any analogous arrangement.

The advantages of my device are thought to be obvious from. the foregoing description, taken in connection with the accompanying drawings, and further detailed reference thereto is deemed unnecessary. v

Having thus described my invention, What I claim, and desire to secure by Letters Patent, 1s

1. The combination, with the holder and the tooth, of the clip passed around the same and a clamping-plate pivotally mounted in the clip and adapted to bind against the tooth,

as set forth.

2. The combination, with the tooth and the holder, of the clip passed around the tooth and the holder, the clamping-plate pivotally mounted in the clamp, and a setscrew mounted in a suitable bearing on the clamping-plate and adapted to bind against the tooth, as set forth.

3. The combination, with the tooth and the holder provided with engaging longitudinal corrugations, of the clip passed around the same and having a groove engaging the corrugations in the holder, and a clamping-plate pivotally mounted in the clamp and adapted v to bind against the tooth, as set forth.

4. A removable clamping device for harrow-teeth, consisting, essentially, of a clip carrying a pivoted clamping-plate provided with a set-screw, as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two Witnesses.

FREDERICK VAN PATTEN.

Witnesses:

R. J OARsoN, B. M. WILooX. 

